Franz Ferdinand (Archduke of Austria) is assassinated in Sarajevo.
June 28, 1914
Germany declares war with Russia.
August 1, 1914
Germany declares war with France. On the same day the country’s armed forces invade Belgium.
August 3, 1914
Britain declares war with Germany.
August 4, 1914
The first Battle of Ypres begins
October 18, 1914
The Battle of the Somme begins.
July 1, 1915
David Lloyd George becomes the new Prime Minister of Britain.
December 7, 1915
the United States enter the conflict by declaring war on Germany.
April 6, 1917
The treaty of Brest-Litovsk is signed with officially brings an end to the war between Russia and Germany.
March 3, 1918
Germany sign armistice agreement and the First World War is officially ended.
November 11, 1918